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Cloud [144]
3 years ago
7

Some protozoans have special organelles called contractile vacuoles that continually eliminate excess water from the cell. The p

resence of these organelles tells you that the environment is what to the protozoan?
Biology
1 answer:
Ann [662]3 years ago
6 0

Answer:

Liquid and with a higher osmotic pressure

Explanation:

Remember that a cell that is surrounded by an environment with a higher osmotic pressure, will produce that the cell get some water outside to make some dilution to the salt concentration that surrounds the protozoan.

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3 years ago
The common garter snake (Thamnophis sirtalis) is found throughout North America. In the South, it is active year round. In the N
Stells [14]

Answer:

The common garter snake (Thamnophis sirtalis) is found throughout North America. In the South, it is active year round. In the North, it is active during the warmer months but hibernates during the winter. It is commonly found basking on warm rocks during cool mornings. This lifestyle indicates that the snake is probably <u>heterothermic</u>.

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Being heterothermic, like all reptiles, garter snakes bask in the sun to regulate their body temperature. During brumation (the reptile equivalent of hibernation), garter snakes typically commonly den together. Sometimes there will be as many as 100 snakes in one cave. A large, communal or group site is called a hibernaculum they occupy is called hibernacula. These snakes will migrate large distances to brumate.

Snakes do not actually hibernate, rather they become less active during cold weather. It is called "brumation."  Brumation is an extreme slowing down of their metabolism. Snakes are awake, but just very lethargic so you don't see them moving around.

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Cold-blooded animals like snakes, fish, frogs, and turtles need to spend the winter inactive, or dormant,  because they have no way to keep warm. Snakes will crawl into any area free from frost such as caves, hollow logs, holes under trees and stumps, under wood piles, in other animal's burrows, and occasionally in a person's basement.

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3 years ago
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